Method for controlling flash memory module and associated flash memory controller and memory device

A flash memory controller, wherein the flash memory controller is configured to access a flash memory module, the flash memory module comprises multiple dies, each die comprises multiple blocks, and each block comprises multiple pages;

• and the flash memory controller comprises:
• a read only memory, configured to store a program code;
• and
• a microprocessor, configured to execute the program code to a control access of the flash memory module;
• wherein the microprocessor is configured to perform the steps of:
• selecting a super block, wherein the super block comprises multiple first blocks respectively located in the multiple dies;
• configuring a controller buffer, where the controller buffer comprises multiple buffers, and each buffer is used to store data to be written to a single page of the super block;
• receiving multiple write requests from a host device and storing the multiple write requests in a buffer request pool in sequence;
• selecting an earliest write request from the buffer request pool;
• determining whether a number of buffers occupied by the first block to be written to corresponding data of the earliest write request in the controller buffer is greater than a threshold value;
• and
• if the number of buffers occupied by the first block to be written to the corresponding data of the earliest write request in the controller buffer is greater than the threshold value, suspending writing the data corresponding to the earliest write request to the controller buffer.